EFFECT OF PROGRAMMED FERTILIZATION ON THE GROWTH OF TOMATOES CULTIVATED IN DIFFERENT SUBSTRATES AND SIZE OF CONTAINERS

Two experiments were made; one in spring and the other one in autumn using containers of the following volumes: 30, 25, 20, 15, 10, 5 dm³ and substrates: moss peat, old pine bark, brown coal and perlite.

The plants were irrigated with the use of mineral solution containing 208 ppm K, 37 ppm P, 49 ppm Mg, 159 ppm Ca, 210 ppm N and microelements but the level of nitrogen was lower up to the third truss set.
It was stated that when the fertilization was programmed, it was possible to use 10–15 dm³ containers for greenhouse tomatoes production using as the medium moss peat, old pine bark and perlite.
Using this system of fertilization the high salt concentration does not occur and the medium needn’t be leached before the next use.

Symposium on the Use of Fertilizers in Protected Vegetable Production

W. Oswiecimski

https://doi.org/10.17660/ActaHortic.1984.145.5